Suppression factors in diffractive photoproduction of dijets

Details Suppression factors in diffractive photoproduction of dijets Suppression factors in diffractive photoproduction of dijets

2010-06-25

arxiv.org/abs/1006.4964v1

Eur.Phys.J.C70:91-106,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 11 figures, 3 tables

Scientific paper

10.1140/epjc/s10052-010-1436-x

After new publications of H1 data for the diffractive photoproduction of dijets, which overlap with the earlier published H1 data and the recently published data of the ZEUS collaboration, have appeared, we have recalculated the cross sections for this process in next-to-leading order (NLO) of perturbative QCD to see whether they can be interpreted consistently. The results of these calculations are compared to the data of both collaborations. We find that the NLO cross sections disagree with the data, showing that factorization breaking occurs at that order. If direct and resolved contributions are both suppressed by the same amount, the global suppression factor depends on the transverse-energy cut. However, by suppressing only the resolved contribution, also reasonably good agreement with all the data is found with a suppression factor independent of the transverse-energy cut.

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